Reinforcing-frame for concrete structures.



G. M. GRAHAM.

REINFORGING FRAME FOR CONCRETE STRUCTURES.

APPLICATION FILED APR. 21, 1909.

1,007,558, I Patented Oct. 31, 1911.

2 SHEETSSHEET l.

G. M. GRAHAM.

REINFORGING FRAME FOR CONCRETE STRUGTUBES.

APPLICATION FILED APR.21, 1909.

1,007,558, Patented Oct. 31, 1911.

2 SHEETSSHEET 2.

UNITED STATES PATENT OFFICE.

GEORGE 1VL GRAHAM, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS,TO SUSPENSION STEEL CONCRETE COMPANY, A CORPORATION OF DELAWARE.

REINFORCING-FRAME FOR CONCRETE STRUCTURES.

Specification of Letters Patent. Patented Oct. 31, 1911.

Application filed April 21, 1909. Serial No. 491,344.

To all whom it may concern:

Be it known that I, GEORGE M. GRAHAM, a citizen of the United States ofAmerica, and a resident of Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inReinforcing-Frames for Concrete Structures, of which the following is aspecification.

This invention relates to reinforcing frames for concrete structures,and has for its object to provide a simple and eflicient structuralarrangement and combination of the frame parts as a whole, whereby thedifferent members are made to coact with each other in providing a verylight and strong structure having maximum rigidity at the points wherethe greater lateral stresses prevail in the operation of erecting theframe and subsequently applying thereto the concrete mass or body whichconstitutes the walls, floors, roof, etc., of the structure. And withwhich a system of construction is attained in which the variousintermediate and the lower floor sections are suspended and mainlysupported by tension connections from the upper or roof series of beamsor girders, for which purpose said upper series of beams are trussed andstrengthened to carry the load so imposed. The system affording very,efiective provisions against the sagging of the frame at differentpoints 0wing to the varied stresses imposed thereon in applying the wirecenters to the different units of the structure, as well as duringtheapplication of the concrete mass from which the walls, floors, etc., ofthe structure are formed, all as will hereinafter more fully appear.

In the accompanying drawings :Figure 1, is a sectional plan View on linemw, Fig. 2. Fig. 2, is a vertical sectional elevation on line ww,Fig. 1. Fig. 3, is an enlarged detail sectional elevation on line 00 aFig. 2. Fig. 4, is an enlarged detail horizontal section on line m mFig. 2.

Similar numerals of reference indicate like parts in the difierentviews.

Referring to the drawings, 1 represents the series of vertical posts orcolumns, and 2, 3 and 4 the upper, intermediate and lower series ofhorizontal beams or girders, coupled together and to the vertical postsby the series of coupling pieces 5 to form the skeleton frame whichsupports the wire centers hereinafter described, and the mass of concrete which forms the wall, floors, etc., of the structure.

The coupling pieces 5 above referred to,

are preferably of the type described in my companion application forLetters Patent,

Serial Number 491,848, filed April 21, 1909.

my former Letters Patent No. 919,714, of'

April 27, 1909, or the same in the modified form set forth in myaforesaid application Serial Number 491,343, and will comprise a pair oflateral studs or queen posts 6 arranged in spaced relation and havingend bearings at the side of a round beam or girder, and carrying attheir other ends bearing shoes 7 for the rod or wire tension members 8of the truss, the ends of which tension members are in turn attached byend loops engaging horns 9 formed on the coupling pieces 5 at themeeting points of the angularly disposed members thereof.

In the present improvement the outer or border beams of the upper series2 of beams or girders will have lateral trusses extending in bothvertical and horizontal planes, in order to withstand the verticalstress imposed thereon in the present system by the suspension therefromof the intermediate and lower floor frames, and the horizontal stressimposed thereon by the skeleton centers and concrete mass whichconstitute the upper floor or roof of the structure. The intermediateand lower series of beams or girders 3 and 4, will be trussed in ahorizontal plane only, in order to sustain the horizontal stress imposedthereon by the skeleton centers and concrete masses which constitute theintermediate and lower floors of the structure.

The suspension means above referred to and by which the beams areconnected together will preferably comprise a series of suspensionmembers arranged and formed as follows: 10 are a series of suspensionlinks, usually three in number, and formed 'by two outer windings andone inner winding of rod metal, extending from one beam to the nextadjacent beam, around said beams, and with the terminals or ends of eachrod wrapped around the double outer winding, as shown in Fig. 3, and asmore specifically set forth in my companion application for LettersPatent Serial Number 491,345, filed April 21, 1909. Said suspensionlinks will have an evenly separated arrangement along the length of therespective beams, and the scope of the present invention includes theuse of any required number of said links, to properly meet therequirements of the various sizes, etc., of structures to which thepresent construction may be applied.

In the formation of the complete reinforcing frame, it is preferable touse intermediate skeleton centers applied in the same manner as abovedescribed in connection with the suspension members 10, and in crossedrelation as illustrated in Fig. 4:.

Where the building or structure comprises a large number of units, thesame construction and arrangement of parts above described will be used,and as illustrative thereof, a plan view of a six unit floor structureis shown in Fig. 1.

Having thus fully described my said invention what I claim as new anddesire to secure by Letters Patent, is

1. In a reinforced concrete structure, a reinforcing frame comprising incombination, a series of vertical posts, an upper series of horizontalbeams, a lower series of horizontal beams, coupling means connecting theposts and beams together, a series of vertical suspension membersconnecting the upper and lower beams together intermediate their length,and means for vertically reinforcing the upper series of beams, theupper beams being adapted to take, through the series of suspensionmembers, the downward stress of the load carried by the lower beams.

2. In a reinforced concrete structure, a reinforcing frame comprising incombination, a series of vertical posts, an upper series of horizontalbeams, a lower series of horizontal beams, coupling pieces connectingthe posts and beams together, and a series of vertical suspensionmembers connecting the upper and lower beams together intermediate theirlength, and comprising outer and inner windings of rod metal extendingfrom beam to beam with their terminals wrapped around the beams andattached to one of the windings, substantially as set forth.

3. In a reinforced concrete structure, a reinforcing frame comprising incombination, a series of vertical posts, an upper series of horizontalbeams, an intermediate series of horizontal beams, a lower series ofhorizon tal beams, coupling pieces connecting the posts and beamstogether, and a series of vertical suspension members connecting theupper, intermediate and lower beams together intermediate their length,and comprising outer and inner windings of rod metal extending from beamto beam with their terminals wrapped around the beams and attached toone of the windings, substantially as set forth.

Signed at Chicago, Illinois, this 12th day of April, 1909.

GEORGE M. GRAHAM.

WVitnesses ROBERT BURNS, L. HOLDEN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. C.

